I’ve read quite a few posts about foreign investor financing but most seem to deal with non-citizen investors without US credit or personal tax filings.

I'm sure they also told you their systems will protect against aggressive attorneys and creditors and make you invisible so nobody will ever dare file a claim against you...it's all a money grab.If you are a sole proprietor I am putting my money on the fact a single member LLC in the state in which you live/own real estate will suffice.

Another key benefit is diversification; an SDIRA allows you to include real estate in your portfolio, reducing risk by spreading your investments across different asset types, which isn’t possible with a standard IRA.Moreover, assets in an SDIRA often enjoy protection from creditors, adding a layer of security to your investments.

The question is would you or other investors be interested in paying for a service that facilitates all of these payments on your behalf so you don't have to worry about the hits to the credit or the change of servicer? 

That makes private financing a solid option for folks with non-traditional credit or complex financial situations that banks might shy away from.Then there’s the tailored approach to loan terms.

I have no creditors or liens besides the unpaid property tax bill.

Then again, if you’re talking about a mortgage on your personal residence, and you live in a state with an unlimited homestead exemption for creditor attachment like Texas or Florida, there’s an asset protection consideration as well.   

Any prospective resident with bad credit or a prior eviction is going to have an impossible time finding a place to live.  

It's a riskier loan given you do not carry a social security, no US credit & no experience.Due to increased risk comes mitigation (Lower LTV & Higher Rates) I don't know whether I have US credit or not, I guess I should.

You may need some help with capital, or credit, or both.